Protein
Modification methylase AvaI
Organism
Nostoc sp. (strain PCC 7120 / SAG 25.82 / UTEX 2576)
Function
This methylase recognizes the double-stranded sequence CYCGRG, causes specific methylation on C-? on both strands, and protects the DNA from cleavage by the AvaI endonuclease.
Similarity
Belongs to the N(4)/N(6)-methyltransferase family. N(4) subfamily.
Sequence
MTSFELESPIEIKTDPTDLDQESDSFVQEISRFNKALEQRFRDKMRLHESLSRKIVSFQANKSKPQYRWFKYKEAFSVDLVNQLIFEYEKKSFERILDPFAGAGTMLFACSDAGIQADGIEVLPIGQEIIEVRKIIQRQFRREDFLRLIEWYKQKPWNQHNNRKYLNRLRITDGAYPPETEASIERFLFSIEKENILVKQVLRFALLCILESISYTRKDGQYLRWDKRAFRKSGSDKFDKGKILDFDEAITEQIKLILNDSFDLISNTLFCYGTQRSGINLFNASCLKILPEFEQDFYDCIITSPPYCNRYDYTRTYALELALLGVGERDIVQLRQDMLSCTVENKEKSLIHNWQEALRILDKQELLQSILRFLERELERKKLNNNGIPRMIKGYFYEMACVIIECFRVLKNGSPLFMVNDNVRYAGIDISVDLILSNIAEEIGFNVEKILVLPTGKGNSSQQMGTHGRKTLRKCVYVWRKP